BREAKING OR EXCAVATING TOOL WITH CEMENTED TUNGSTEN CARBIDE INSERT AND RING, MATERIAL REMOVING MACHINE INCORPORATING SUCH A TOOL AND METHOD OF MANUFACTURING SUCH A TOOL

摘要

An exemplary breaking or excavating tool(102) comprising a body (104) having a mounting end (106)and a working end (108). Aseating surface (112) at the work-ingend (108) including a cavity (114) and axially projectingsidewalls (116) formed integral to the body (104), an insert(120) mounted within the cavity (112) having a tip (122) atan axially forwardmost end (124), a tapered forward surface(126), a side surface (128) and a transition edge (130) at anintersection of the forward surface (126) and the side surface(128). A ring (140) located radially outward of the projectingsidewalls (116), the ring (140) formed of a material harderthan the body (104) of the tool (102). An axial position ofthe transition edge (130) and an axial position of an axiallyforwardmost surface (118) of the sidewalls (116) are substan-tiallythe same. A material removal machine on which thebreaking or excavating tool (102) is mounted and a methodof manufacturing the breaking or excavating tool (102) arealso disclosed.